Hector von bayer



(NovModel.) f H. VON BAYER.

AIRr 0R VAPOR PUMP.`

Patented Aug. 27, 1889,.

lill/ll WJWVESSES UNITED 'STATES PATENT OFFICE.

IIEOTOR vON BAYER, or WASHINGTON, DIsTRIcT OFOOLUMEIA.

AIR4 OR VAPOR PUMP.

SPECIFICATION formingpart @Letters raient No. 410,052, dated August 27, 1889. i

Application filed March 1`9,`1`2}89.` Serial No. 303,845. (No model.)

To all whom it may concern: Y

Be it known that I, HECTOR VON BAYER, of Washington, in the District of Columbia, have invented new and useful Improvements in Airor Vapor Pumps, 4of which the following is a full and exact description, reference l being had to the accompanying drawings, making part of this specification.

The invention relates to improved valves for air and vapor pumps in which the combined inlet and delivery valves covert-he whole area of the end of the pump-cylinder andare inclosed within a chambenand in which the in1et-valve is seated within the delivery-valve, and the delivery-valve provided with a hollow stem, through which and the inlet-valve the air or vapor enters the pumpcylinder. These pumps as heretofore constructed and arranged to prevent the compressed air or vapor in the chamber from reentering the pump-cylinder through the hollow stem of the delivery-valve have had the stem mounted to move in a cylinder or sleeve, with the cylinder or sleeve to project into or beyond the chamber, but in these a packing was necessary, and this packing caused more or less friction and renderedl the working of the valve under low pressure ineffective.

To remedy this defect or overcome the difflculty heretofore experienced is the object of my invention; and to this end the invention consists in the construction hereinafter described and claimed, embodying ayielding elastic or iiexible connection between the suction-pipe and delivery valve, whereby the packing may loe dispensed with and a free movement of the valve obtained.

In the accompanying drawings, Figure lis a transverse sectional view showing the improvement applied to a vapor-pump or for compressing air. Fig. 2 is a similar view of the device when applied to air-pumps proper, wherein the device is Aused to pump air or to produce a vacuum. Fig. 3 is a horizontal section through the line X X, Fig. 2.

In the drawings only the lower end of the pump-cylinder A is shown with the pistonhead A and a portion of the rod A2, and which parts may be constructed in any usual or preferred way. To the lower end of this cylinder is connected the closed chamber B,

which chamber is provided with an inletopening B and a delivery pipe or outlet B2. This chamber is provided with a hand-hole B3 for affording access to the interior of the same,

and which is closed by the usual form of cover. The diameter of the inner circumference of the chamber B is larger than that of the cylinder,

- as shown at b, to form a seat for the deliveryvalve, as hereinafter referred to. ,g

\ Within the chamber `B is mounted the delivery-valve, consistingof the circular `head C andthe hollow stem C.` The diameter of the head is made sufficiently smaller than the inner diameter of the chamber to permit the escape of the air or vapor when the valve is forced from its seat by the action of the piston, said seat being formed by the projecting 'portion b of the cylinder B, beforerefferred to: Radial ribs dproject from the outer face of the delivery-valve, having their outer edges to engage the inner face of the chamber, and by such engagement to guideand hold the valve in proper working position.

Within the hollow stem of the deliveryvalve ismounted the inlet or suction valve, which valve consists of a shank portion composed of radial arms D and a tapering or conical head D', which headfits in a tapering or conical recess, forming the seat for the valve. A pin or rod D2, provided with an elongated slotted opening-projects from the lower end of the shank portion, which slot is engaged by a pin passing through the walls of the stem of the delivery-valve and by such engagement to limit the upward movement of the valve, or prevent the same being drawn too far out by the suction. The lower end of the stem of the delivery-valve is provided with an annular iiange CZ', and the portion of the inlet-pipe that extends into the chamber is provided with a similar ange d2, and to which iianges are connected the ends of a flexible tube-such as rubberl hose-and by means of which connection to form a tightbut flexible connection between the said parts, which form of connection permits the delivery-valve to move freely in the chamber, and at the same time form such a connection between the pipes as to prevent the return of any air orvapor back into the pump. 'lhe IOO connection may be of the material and construction above described, or may be in the form of a coiled flexible metal pipe, as shall be found most desirable. surrounds the stem and engages the radial ribs d and the bottom of the chamber B, the tension of which spring is regulated or adjusted to hold the valve to its seat Withsuicient force for the proper action of the Valve.

As has before been stated, the end of the cylinder forms the seat for the delivery-valve, and the inlet-valve is seated in the hollow stem, andthe parts operate in the following manner: The pipe B being connected with the source of supply and the pipe Bzwith the receiver, the piston-rod is reciprocated. As the same moves away from the valves it produces a vacuum in the cylinder, which causes the air or vapor to iiow in and fill the cylinder, raising the valveD from its seat. Upon a reversal of the piston the air is compressed and :forces the valve D to its seat,

.and by a continued compression of the air act- 1 ing to overcome the tension of the spr-ing E and to force the deliveryvalve from its seat and allow the escape of the air or vapor into the chamber B, and to pass through the outlet B2 to the receiver in a manner that will be readily understood.

In Fig. 2 the device is shown applied where it is used only to pump air or create a vacuum, in which case the chamber B is formed asv a part of the pump-cylinder A, and rests or is connected with a suitable base, and in which case the stem of the delivery-valve eX-.

A spiral spring E tends through an enlarged opening in said base G, which opening is of suicient size to provide a passage for the escape of air from the chamber. In this case the stem of the delivery-valve is provided with a suitable screw-threaded end, and has the supply-pipe connected thereto through an ordinary pipecoupling, which pipe may be formed of any desired material or in any preferred manner to allow of the movement of the deliveryvalve.

Having now described myinvention, what I claim as new, and desire to secure by Letters Patent, is.` .i

l. The combination of the pump-cylinder having the chamber at the end thereof, a delivery-valve provided with the hollow stem in which the inlet-Valve is located, and a flexible air-tight pipe to form a connection between the hollow stem of the delivery-.valve and the source of supply, substantially as and 'for the purpose set forth.

2. In an air or Vapor pump having the valves located one within the other and arranged at the end of the pump-cylinder within a chamber, an elastic or flexible air-tight pipe connecting the hollow stem of the discharge-valve with the suction-pipe, substantially as described.

In testimony whereof I have hereunto set my hand this 18th day of March, A. D. 18,89.

Hi VON BAYER.

Witnesses ALEX.v MAHoN, WARREN C. STONE, 

